21232012342 has 8 divisors (see below), whose sum is σ = 31872464496. Its totient is φ = 10607857512.

The previous prime is 21232012337. The next prime is 21232012349. The reversal of 21232012342 is 24321023212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232012349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4071073 + ... + 4076284.

It is an arithmetic number, because the mean of its divisors is an integer number (3984058062).

Almost surely, 2^21232012342 is an apocalyptic number.

21232012342 is a deficient number, since it is larger than the sum of its proper divisors (10640452154).

21232012342 is a wasteful number, since it uses less digits than its factorization.

21232012342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148662.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21232012342 its reverse (24321023212), we get a palindrome (45553035554).

The spelling of 21232012342 in words is "twenty-one billion, two hundred thirty-two million, twelve thousand, three hundred forty-two".